C++ CreateBase函数代码示例

// real construction (Init() must have been called before!)
bool wxWindowDFB::Create(wxWindow *parent,
                         wxWindowID id,
                         const wxPoint& pos,
                         const wxSize& size,
                         long style,
                         const wxString& name)
{
    if ( !m_tlw && parent )
        m_tlw = parent->GetTLW();

    if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
        return false;

    if ( parent )
        parent->AddChild(this);

    // set the size to something bogus initially, in case some code tries to
    // create wxWindowDC before SetSize() is called below:
    m_rect.width = m_rect.height = 1;

    int x, y, w, h;
    x = pos.x, y = pos.y;
    if ( x == -1  ) x = 0;
    if ( y == -1 ) y = 0;
    w = WidthDefault(size.x);
    h = HeightDefault(size.y);
    SetSize(x, y, w, h);

    return true;
}

bool wxToggleButton::Create(wxWindow *parent, wxWindowID id,
                            const wxString &label, const wxPoint &pos,
                            const wxSize &size, long style,
                            const wxValidator& validator,
                            const wxString &name)
{
    m_needParent = true;
    m_acceptsFocus = true;

    m_blockEvent = false;

    if (!PreCreation(parent, pos, size) ||
        !CreateBase(parent, id, pos, size, style, validator, name )) {
        wxFAIL_MSG(wxT("wxToggleButton creation failed"));
        return false;
    }

    wxControl::SetLabel(label);

    // Create the gtk widget.
    m_widget = gtk_toggle_button_new_with_label( wxGTK_CONV( m_label ) );

    gtk_signal_connect(GTK_OBJECT(m_widget), "clicked",
                       GTK_SIGNAL_FUNC(gtk_togglebutton_clicked_callback),
                       (gpointer *)this);

    m_parent->DoAddChild(this);

    PostCreation(size);

    return true;
}

bool wxMDIClientWindow::CreateClient(wxMDIParentFrame *parent, long style)
{
    if ( !PreCreation( parent, wxDefaultPosition, wxDefaultSize ) ||
         !CreateBase( parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
                       style, wxDefaultValidator, "wxMDIClientWindow" ))
    {
        wxFAIL_MSG( "wxMDIClientWindow creation failed" );
        return false;
    }

    m_widget = gtk_notebook_new();
    g_object_ref(m_widget);

    g_signal_connect (m_widget, "switch_page",
                      G_CALLBACK (gtk_mdi_page_change_callback), parent);

    gtk_notebook_set_scrollable( GTK_NOTEBOOK(m_widget), 1 );

    m_parent->DoAddChild( this );

    PostCreation();

    Show( true );

    return true;
}

bool wxToggleButton::Create(wxWindow *parent, wxWindowID id,
                            const wxString &label, const wxPoint &pos,
                            const wxSize &size, long style,
                            const wxValidator& validator,
                            const wxString &name)
{
    if (!PreCreation(parent, pos, size) ||
        !CreateBase(parent, id, pos, size, style, validator, name ))
    {
        wxFAIL_MSG(wxT("wxToggleButton creation failed"));
        return false;
    }

    // Create the gtk widget.
    m_widget = gtk_toggle_button_new_with_mnemonic("");
    g_object_ref(m_widget);

    SetLabel(label);

    g_signal_connect (m_widget, "clicked",
                      G_CALLBACK (gtk_togglebutton_clicked_callback),
                      this);

    m_parent->DoAddChild(this);

    PostCreation(size);

    return true;
}

bool wxMDIClientWindow::CreateClient( wxMDIParentFrame *parent, long style )
{
    m_needParent = true;

    m_insertCallback = (wxInsertChildFunction)wxInsertChildInMDI;

    if (!PreCreation( parent, wxDefaultPosition, wxDefaultSize ) ||
            !CreateBase( parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, style, wxDefaultValidator, wxT("wxMDIClientWindow") ))
    {
        wxFAIL_MSG( wxT("wxMDIClientWindow creation failed") );
        return false;
    }

    m_widget = gtk_notebook_new();

    gtk_signal_connect( GTK_OBJECT(m_widget), "switch_page",
                        GTK_SIGNAL_FUNC(gtk_mdi_page_change_callback), (gpointer)parent );

    gtk_notebook_set_scrollable( GTK_NOTEBOOK(m_widget), 1 );

    m_parent->DoAddChild( this );

    PostCreation();

    Show( true );

    return true;
}

bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,
      const wxPoint &pos, const wxSize &size,
      long style, const wxValidator& validator, const wxString &name )
{
    m_needParent = true;
    m_acceptsFocus = true;

    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, validator, name ))
    {
        wxFAIL_MSG( wxT("wxButton creation failed") );
        return false;
    }

    m_widget = gtk_button_new_with_mnemonic("");

    float x_alignment = 0.5;
    if (HasFlag(wxBU_LEFT))
        x_alignment = 0.0;
    else if (HasFlag(wxBU_RIGHT))
        x_alignment = 1.0;

    float y_alignment = 0.5;
    if (HasFlag(wxBU_TOP))
        y_alignment = 0.0;
    else if (HasFlag(wxBU_BOTTOM))
        y_alignment = 1.0;

#ifdef __WXGTK24__
    if (!gtk_check_version(2,4,0))
    {
        gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);
    }
    else
#endif
    {
        if (GTK_IS_MISC(GTK_BIN(m_widget)->child))
            gtk_misc_set_alignment(GTK_MISC(GTK_BIN(m_widget)->child),
                                x_alignment, y_alignment);
    }

    SetLabel(label);

    if (style & wxNO_BORDER)
       gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );

    g_signal_connect_after (m_widget, "clicked",
                            G_CALLBACK (gtk_button_clicked_callback),
                            this);

    g_signal_connect_after (m_widget, "style_set",
                            G_CALLBACK (gtk_button_style_set_callback),
                            this);

    m_parent->DoAddChild( this );

    PostCreation(size);

    return true;
}

bool wxStaticBitmap::Create( wxWindow *parent, wxWindowID id, const wxBitmap &bitmap,
                             const wxPoint &pos, const wxSize &size,
                             long style, const wxString &name )
{
    m_needParent = TRUE;

    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
    {
        wxFAIL_MSG( wxT("wxStaticBitmap creation failed") );
        return false;
    }

    m_bitmap = bitmap;

    wxBitmap bmp(bitmap.IsOk() ? bitmap : wxBitmap(bogus_xpm));
    m_widget = gtk_pixmap_new(bmp.GetPixmap(), NULL);

    if (bitmap.IsOk())
        SetBitmap(bitmap);

    PostCreation(size);
    m_parent->DoAddChild( this );

    return true;
}

bool wxTopLevelWindowQt::Create( wxWindow *parent, wxWindowID winId,
    const wxString &title, const wxPoint &pos, const wxSize &sizeOrig,
    long style, const wxString &name )
{
    wxSize size(sizeOrig);
    if ( !size.IsFullySpecified() )
        size.SetDefaults( GetDefaultSize() );

    wxTopLevelWindows.Append( this );

    if (!CreateBase( parent, winId, pos, size, style, wxDefaultValidator, name ))
    {
        wxFAIL_MSG( wxT("wxTopLevelWindowNative creation failed") );
        return false;
    }

    SetTitle( title );
    SetWindowStyleFlag( style );

    if (pos != wxDefaultPosition)
        m_qtWindow->move( pos.x, pos.y );

    m_qtWindow->resize( wxQtConvertSize( size ) );

    // Prevent automatic deletion of Qt main window on close
    // (this should be the default, but left just fo enforce it)
    GetHandle()->setAttribute(Qt::WA_DeleteOnClose, false);

    // not calling to wxWindow::Create, so do the rest of initialization:
    if (parent) parent->AddChild( this );

    return true;
}

// Replaces wxWindow::Create functionality, since we need to use a different
// window class
bool wxGLCanvas::CreateWindow(wxWindow *parent,
                              wxWindowID id,
                              const wxPoint& pos,
                              const wxSize& size,
                              long style,
                              const wxString& name)
{
    wxCHECK_MSG( parent, false, wxT("can't create wxWindow without parent") );

    if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
        return false;

    parent->AddChild(this);

    /*
       A general rule with OpenGL and Win32 is that any window that will have a
       HGLRC built for it must have two flags:  WS_CLIPCHILDREN & WS_CLIPSIBLINGS.
       You can find references about this within the knowledge base and most OpenGL
       books that contain the wgl function descriptions.
     */
    WXDWORD exStyle = 0;
    DWORD msflags = WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
    msflags |= MSWGetStyle(style, &exStyle);

    if ( !MSWCreate(wxApp::GetRegisteredClassName(wxT("wxGLCanvas"), -1, CS_OWNDC),
                    NULL, pos, size, msflags, exStyle) )
        return false;

    m_hDC = ::GetDC(GetHwnd());
    if ( !m_hDC )
        return false;

    return true;
}

bool wxFontDialog::DoCreate(wxWindow *parent)
{
    m_needParent = false;

    if (!PreCreation( parent, wxDefaultPosition, wxDefaultSize ) ||
        !CreateBase( parent, -1, wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE,
                     wxDefaultValidator, wxT("fontdialog") ))
    {
        wxFAIL_MSG( wxT("wxFontDialog creation failed") );
        return false;
    }

    wxString m_message( _("Choose font") );
    m_widget = gtk_font_selection_dialog_new( wxGTK_CONV( m_message ) );

    if (parent)
        gtk_window_set_transient_for(GTK_WINDOW(m_widget),
                                     GTK_WINDOW(parent->m_widget));

    GtkFontSelectionDialog *sel = GTK_FONT_SELECTION_DIALOG(m_widget);

    gtk_signal_connect( GTK_OBJECT(sel->ok_button), "clicked",
      GTK_SIGNAL_FUNC(gtk_fontdialog_ok_callback), (gpointer*)this );

    // strange way to internationalize
    gtk_label_set( GTK_LABEL( BUTTON_CHILD(sel->ok_button) ), _("OK") );

    gtk_signal_connect( GTK_OBJECT(sel->cancel_button), "clicked",
      GTK_SIGNAL_FUNC(gtk_fontdialog_cancel_callback), (gpointer*)this );

    // strange way to internationalize
    gtk_label_set( GTK_LABEL( BUTTON_CHILD(sel->cancel_button) ), _("Cancel") );

    gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",
        GTK_SIGNAL_FUNC(gtk_fontdialog_delete_callback), (gpointer)this );

    wxFont font = m_fontData.GetInitialFont();
    if( font.IsOk() )
    {
        const wxNativeFontInfo *info = font.GetNativeFontInfo();

        if ( info )
        {

            const wxString& fontname = info->GetXFontName();
            if ( !fontname )
                font.GetInternalFont();

            gtk_font_selection_dialog_set_font_name(sel, wxGTK_CONV(fontname));
        }
        else
        {
            // this is not supposed to happen!
            wxFAIL_MSG(wxT("font is ok but no native font info?"));
        }
    }

    return true;
}

bool wxCheckBox::Create(wxWindow *parent,
                        wxWindowID id,
                        const wxString &label,
                        const wxPoint &pos,
                        const wxSize &size,
                        long style,
                        const wxValidator& validator,
                        const wxString &name )
{
    m_needParent = true;
    m_acceptsFocus = true;
    m_blockEvent = false;

    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, validator, name ))
    {
        wxFAIL_MSG( wxT("wxCheckBox creation failed") );
        return false;
    }

    wxASSERT_MSG( (style & wxCHK_ALLOW_3RD_STATE_FOR_USER) == 0 ||
                  (style & wxCHK_3STATE) != 0,
                  wxT("Using wxCHK_ALLOW_3RD_STATE_FOR_USER")
                  wxT(" style flag for a 2-state checkbox is useless") );

    if ( style & wxALIGN_RIGHT )
    {
        // VZ: as I don't know a way to create a right aligned checkbox with
        //     GTK we will create a checkbox without label and a label at the
        //     left of it
        m_widgetCheckbox = gtk_check_button_new();

        m_widgetLabel = gtk_label_new("");
        gtk_misc_set_alignment(GTK_MISC(m_widgetLabel), 0.0, 0.5);

        m_widget = gtk_hbox_new(FALSE, 0);
        gtk_box_pack_start(GTK_BOX(m_widget), m_widgetLabel, FALSE, FALSE, 3);
        gtk_box_pack_start(GTK_BOX(m_widget), m_widgetCheckbox, FALSE, FALSE, 3);

        gtk_widget_show( m_widgetLabel );
        gtk_widget_show( m_widgetCheckbox );
    }
    else
    {
        m_widgetCheckbox = gtk_check_button_new_with_label("");
        m_widgetLabel = GTK_BIN(m_widgetCheckbox)->child;
        m_widget = m_widgetCheckbox;
    }
    SetLabel( label );

    g_signal_connect (m_widgetCheckbox, "toggled",
                      G_CALLBACK (gtk_checkbox_toggled_callback), this);

    m_parent->DoAddChild( this );

    PostCreation(size);

    return true;
}

bool wxDirDialog::Create(wxWindow* parent,
                         const wxString& title,
                         const wxString& defaultPath,
                         long style,
                         const wxPoint& pos,
                         const wxSize& WXUNUSED(sz),
                         const wxString& WXUNUSED(name))
{
    m_message = title;

    parent = GetParentForModalDialog(parent, style);

    if (!PreCreation(parent, pos, wxDefaultSize) ||
        !CreateBase(parent, wxID_ANY, pos, wxDefaultSize, style,
                wxDefaultValidator, wxT("dirdialog")))
    {
        wxFAIL_MSG( wxT("wxDirDialog creation failed") );
        return false;
    }

    GtkWindow* gtk_parent = NULL;
    if (parent)
        gtk_parent = GTK_WINDOW( gtk_widget_get_toplevel(parent->m_widget) );

    m_widget = gtk_file_chooser_dialog_new(
                   wxGTK_CONV(m_message),
                   gtk_parent,
                   GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER,
                   GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                   GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
                   NULL);
    g_object_ref(m_widget);

    gtk_dialog_set_default_response(GTK_DIALOG(m_widget), GTK_RESPONSE_ACCEPT);
#if GTK_CHECK_VERSION(2,18,0)
#ifndef __WXGTK3__
    if (gtk_check_version(2,18,0) == NULL)
#endif
    {
        gtk_file_chooser_set_create_folders(
            GTK_FILE_CHOOSER(m_widget), (style & wxDD_DIR_MUST_EXIST) == 0);
    }
#endif

    // local-only property could be set to false to allow non-local files to be loaded.
    // In that case get/set_uri(s) should be used instead of get/set_filename(s) everywhere
    // and the GtkFileChooserDialog should probably also be created with a backend,
    // e.g. "gnome-vfs", "default", ... (gtk_file_chooser_dialog_new_with_backend).
    // Currently local-only is kept as the default - true:
    // gtk_file_chooser_set_local_only(GTK_FILE_CHOOSER(m_widget), true);

    g_signal_connect (m_widget, "response",
        G_CALLBACK (gtk_dirdialog_response_callback), this);

    if ( !defaultPath.empty() )
        SetPath(defaultPath);

    return true;
}

bool wxDirDialog::Create(wxWindow* parent,
                         const wxString& title,
                         const wxString& defaultPath,
                         long style,
                         const wxPoint& pos,
                         const wxSize& WXUNUSED(sz),
                         const wxString& WXUNUSED(name))
{
    m_message = title;

    parent = GetParentForModalDialog(parent, style);

    if (!PreCreation(parent, pos, wxDefaultSize) ||
        !CreateBase(parent, wxID_ANY, pos, wxDefaultSize, style,
                wxDefaultValidator, wxT("dirdialog")))
    {
        wxFAIL_MSG( wxT("wxDirDialog creation failed") );
        return false;
    }

    GtkWindow* gtk_parent = NULL;
    if (parent)
        gtk_parent = GTK_WINDOW( gtk_widget_get_toplevel(parent->m_widget) );

    m_widget = gtk_file_chooser_dialog_new(
                   wxGTK_CONV(m_message),
                   gtk_parent,
                   GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER,
                   GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                   GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
                   NULL);
    g_object_ref(m_widget);

    gtk_dialog_set_default_response(GTK_DIALOG(m_widget), GTK_RESPONSE_ACCEPT);

    // gtk_widget_hide_on_delete is used here to avoid that Gtk automatically destroys
    // the dialog when the user press ESC on the dialog: in that case a second call to
    // ShowModal() would result in a bunch of Gtk-CRITICAL errors...
    g_signal_connect (m_widget,
                    "delete_event",
                    G_CALLBACK (gtk_widget_hide_on_delete),
                    (gpointer)this);

    // local-only property could be set to false to allow non-local files to be loaded.
    // In that case get/set_uri(s) should be used instead of get/set_filename(s) everywhere
    // and the GtkFileChooserDialog should probably also be created with a backend,
    // e.g. "gnome-vfs", "default", ... (gtk_file_chooser_dialog_new_with_backend).
    // Currently local-only is kept as the default - true:
    // gtk_file_chooser_set_local_only(GTK_FILE_CHOOSER(m_widget), true);

    g_signal_connect (m_widget, "response",
        G_CALLBACK (gtk_dirdialog_response_callback), this);

    if ( !defaultPath.empty() )
        SetPath(defaultPath);

    return true;
}

bool wxRadioButton::Create( wxWindow *parent,
                            wxWindowID id,
                            const wxString& label,
                            const wxPoint& pos,
                            const wxSize& size,
                            long style,
                            const wxValidator& validator,
                            const wxString& name )
{
    m_acceptsFocus = TRUE;
    m_needParent = TRUE;

    m_blockEvent = FALSE;

    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, validator, name ))
    {
        wxFAIL_MSG( wxT("wxRadioButton creation failed") );
        return FALSE;
    }

    GSList* radioButtonGroup = NULL;
    if (!HasFlag(wxRB_GROUP))
    {
        // search backward for last group start
        wxRadioButton *chief = NULL;
        wxWindowList::compatibility_iterator node = parent->GetChildren().GetLast();
        while (node)
        {
            wxWindow *child = node->GetData();
            if (child->IsRadioButton())
            {
                chief = (wxRadioButton*) child;
                if (child->HasFlag(wxRB_GROUP))
                    break;
            }
            node = node->GetPrevious();
        }
        if (chief)
        {
            // we are part of the group started by chief
            radioButtonGroup = gtk_radio_button_group( GTK_RADIO_BUTTON(chief->m_widget) );
        }
    }

    m_widget = gtk_radio_button_new_with_label( radioButtonGroup, wxGTK_CONV( label ) );

    SetLabel(label);

    gtk_signal_connect( GTK_OBJECT(m_widget), "clicked",
      GTK_SIGNAL_FUNC(gtk_radiobutton_clicked_callback), (gpointer*)this );

    m_parent->DoAddChild( this );

    PostCreation(size);

    return TRUE;
}

bool wxToolBar::Create( wxWindow *parent,
                        wxWindowID id,
                        const wxPoint& pos,
                        const wxSize& size,
                        long style,
                        const wxString& name )
{
    if ( !PreCreation( parent, pos, size ) ||
         !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
    {
        wxFAIL_MSG( wxT("wxToolBar creation failed") );

        return false;
    }

    FixupStyle();

    m_toolbar = GTK_TOOLBAR( gtk_toolbar_new() );
#if !GTK_CHECK_VERSION(3,0,0) && !defined(GTK_DISABLE_DEPRECATED)
    if (gtk_check_version(2, 12, 0))
    {
        m_tooltips = gtk_tooltips_new();
        g_object_ref(m_tooltips);
        gtk_object_sink(GTK_OBJECT(m_tooltips));
    }
#endif
    GtkSetStyle();

    if (style & wxTB_DOCKABLE)
    {
        m_widget = gtk_handle_box_new();

        g_signal_connect(m_widget, "child_detached",
            G_CALLBACK(child_detached), NULL);
        g_signal_connect(m_widget, "child_attached",
            G_CALLBACK(child_attached), NULL);

        if (style & wxTB_FLAT)
            gtk_handle_box_set_shadow_type( GTK_HANDLE_BOX(m_widget), GTK_SHADOW_NONE );
    }
    else
    {
        m_widget = gtk_event_box_new();
        ConnectWidget( m_widget );
    }
    g_object_ref(m_widget);
    gtk_container_add(GTK_CONTAINER(m_widget), GTK_WIDGET(m_toolbar));
    gtk_widget_show(GTK_WIDGET(m_toolbar));

    m_parent->DoAddChild( this );

    PostCreation(size);

    g_signal_connect_after(m_toolbar, "size_request",
        G_CALLBACK(size_request), this);

    return true;
}